The two-and-a-half minute clip begins with the reminder: "It's been 20 years," and continues with "It's 4th of July, let's show them some fireworks." The trailer however, highlights how the technology developed to combat extra-terrestrial invasion proves inadequate in the face of threats from a world beyond Earth

Conspicuous by his absence is actor Will Smith's Col Steven Hiller. "We are fighting for our freedom, from annihilation. We will not go quietly into the night, we will not vanish without a fight," the aliens ominously warn in the trailer